Hu Yongqiang, Zhongwu Middle School, xinyi city I think there are two purposes for setting up the unit review course in mathematics: one is to relearn the learning object and summarize the previous mathematics knowledge at a higher level, so as to make it more systematic, organized and in-depth, so that students can master the mathematics knowledge learned in this unit from a strategic perspective and make their understanding reach a higher level. At the same time, through the effect of "reviewing the past and knowing the new"; The second is to cultivate students' abilities in all aspects through the teaching of unit review class. The task of review teaching is not only to review the mathematics knowledge learned, but also to further exercise and develop students' skills and abilities. There are many knowledge points in the unit review course, so it is not easy to learn this course well. "Standard" points out that "design teaching activities consciously and planned in teaching, guide students to understand the relationship between mathematics, feel the integrity of mathematics, constantly enrich problem-solving strategies and improve problem-solving ability". After learning the content of a chapter, students often can't quickly establish the logical structure of the whole chapter, lack the overall understanding of the whole chapter, and even are not very clear about the core content of the whole chapter, which requires a summary and reflection on the whole chapter. Unit review is an important link in students' learning mathematics. The task of the unit review course should be to summarize and sort out the knowledge learned at a certain stage, so that it can be organized and systematic, and to further consolidate and deepen the basic knowledge by checking and filling in gaps, so as to improve students' skills, learning ability and ability to solve practical problems. Its purpose is to review the past, improve the cognitive structure, develop mathematical ability and promote students' all-round and sustainable development. At ordinary times, we often take teachers as the main body, sum up concepts and give careful examples to complete the unit review class of junior high school mathematics. Although this unit review class can also achieve a certain review effect, it is equivalent to quickly repeating what you have learned before, pursuing more goals at the knowledge level and less goals at the ability level. Pay more attention to textbooks and less attention to students; Practice doing problems more and comb the knowledge structure less. At the same time, teacher-centered explanation is difficult to mobilize students' enthusiasm for learning, which is not conducive to stimulating students' interest in learning; It restricts most students' desire for expression and sense of accomplishment, and also causes some underachievers' sense of rejection and loss, which is not conducive to students' personality and personality development. The Standard requires students to experience the process of knowledge formation and application, so as to better understand the meaning of mathematical knowledge. For different students, I think the unit review class may focus on combing knowledge points, connecting points, weaving nets and building a knowledge system; Or focus on problem correction and concept discrimination; Or focus on the re-understanding of the activity process and improve the ability to solve problems. The classified query of periodical articles lies in that the unit review course of periodical library is an important part of mathematics classroom teaching. Its teaching is not a simple repetition of knowledge, but a supplement, deepening and improvement of students' cognition. I will focus on the following points in the review class of design units: 1. What knowledge does the teaching content include, and what are the key points and difficulties? 2. How well do students master these knowledge, skills and techniques? What common and typical mistakes have occurred, and what are the reasons? 3. What have the students not mastered? Where are their difficulties? The process of unit review teaching is a process for students to re-understand the knowledge in this chapter and further master and understand what they have learned from a higher level and a newer perspective. Therefore, the unit review class highlights the characteristics of students' learning activities as "internalized learning", reviews and sorts out what they have learned, constructs a knowledge framework and forms a self-knowledge system. The basic teaching curriculum reform takes "student-oriented" as the basic curriculum concept. The unit review course mainly focuses on how to highlight students' dominant position and how to improve the effectiveness of students' learning. In the process of teaching design, teachers should reasonably integrate students' learning methods, teaching materials presentation methods and teacher-student interaction methods, and guide students to establish a review course mechanism of independent, exploration, discovery, promotion and cooperative learning. I usually design such a teaching model in unit review class: a problem situation. Introduce chapter knowledge from students' mistakes or directly from students' mistakes. For chapter knowledge, the first study pays more attention to the understanding, understanding and mastery of knowledge, summing up and thinking, which is a re-understanding of this chapter knowledge, and pays more attention to the correlation between knowledge points and the in-depth understanding and application of knowledge points. By sorting out the errors caused by cognitive deviation in students' usual study, the source of errors is formed and introduced as a situation. Collision with students' original knowledge can fully mobilize students' experience and "emotional intelligence", stimulate students' learning motivation and curiosity, cultivate students' thirst for knowledge, promote their thinking to enter the best state, correct their own understanding in the process of exploration and establish a complete knowledge system. 2. Adventure activities. In the teaching process, I adopt the method of focusing on students' mistakes, and determine the key points and difficulties to be solved according to students' mastery of knowledge and skills and their forgetting and omission. Secondly, let students re-recognize their previous mistakes, connect all the knowledge points into a network in the process of identification, and correct the mistakes in the process of identification. 3. Mathematical understanding. The mathematical understanding of unit review course is the formation of knowledge structure diagram in this chapter. This link is the process of refining the knowledge structure. On the basis of overall understanding, the core contents and core thinking methods that play a basic and bridge role are sorted out. Its purpose is to let students know the main line of logical knowledge and thinking methods in this chapter. On the basis of the previous sections, students have a strategic view of the knowledge structure, mathematical ideas and teaching methods of this chapter by solving the problem of setting this link. Basic training and development. In the teaching of unit review course, I think it is necessary to "internalize" knowledge through effective basic training and do a certain amount of in-class exercises in order to systematically review what I have learned in a short time. The exercises in the review class can be designed into problem groups according to the basic content of the review, and the choice of topics is mainly based on the core skills training or methodology training in this chapter. The unit review class focuses on examining the communication and connection between students' knowledge, flexibly combining these knowledge points, and finding out the relevant knowledge points and methods to solve the problem by synthesizing the information provided by the topic. This kind of extension is a moderate extension of the knowledge learned, which is conducive to stimulating students' interest in learning and broadening their horizons.